package cn.javaxc.mvcwork.util.common;

import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Component;
import org.springframework.web.context.WebApplicationContext;
import org.springframework.core.annotation.Order;
import javax.servlet.ServletContext;

@Order(10000)
@Component("mvcSpringUtils")
public class SpringUtils implements ApplicationContextAware {
	
	public static ApplicationContext applicationContext; 

	@Override
	public void setApplicationContext(ApplicationContext applicationContext)
			throws BeansException {
		SpringUtils.applicationContext = applicationContext;
	}
    // 获取applicationContext
    public static ApplicationContext getApplicationContext() {
        return applicationContext;
    }

	public static Object getBean(String name) {
		return applicationContext.getBean(name);
	}

	public static <T> T getBean(String name, Class<T> requiredType) {
		return applicationContext.getBean(name, requiredType);
	}

	public static boolean containsBean(String name) {
		return applicationContext.containsBean(name);
	}

	public static boolean isSingleton(String name) {
		return applicationContext.isSingleton(name);
	}

	public static Class<? extends Object> getType(String name) {
		return applicationContext.getType(name);
	}

    public static ServletContext getApplication(){
        WebApplicationContext webApplicationContext = (WebApplicationContext) getApplicationContext();
        return webApplicationContext.getServletContext();
    }

	//通过class获取Bean.
	public static <T> T getBean(Class<T> clazz){
		return getApplicationContext().getBean(clazz);
	}

}